Day 18: Weather monitoring
Behind today’s door is a very special component, namely a humidity sensor. Together with the phototransistor and the NTC, it creates a weather station for at-home use. The following layout is necessary for this purpose:
Today’s layout is a bit fiddly. Especially at the point where the potentiometer on the right of the image sits, it touches the NanoESP. But that’s not really a problem as long as the contact on the left of the image is plugged firmly into the board.
After you upload the programme, you can now open the website. You see three values that are represented as text and as bars. You can now calibrate the values somewhat with the potentiometers. The temperature value, especially, should be compared to a thermometer and adjusted. That’s the only way to ensure that the information on the website is more or less accurate.